Seems to me there was a class action lawsuit about Masonite siding, and I think the original company is now defunct. Possibly the siding would morph into new shapes when subjected to moisture.

"
Vinyl siding has always been designed as an exterior cladding, not a weather resistant barrier.
Vinyl siding is designed to allow the material underneath it to breathe; therefore, it is not a
watertight covering. Because of its design and application, it provides a supplemental rain screen
that enhances the weather resistant barrier system by reducing the amount of water that reaches the
underlying weather resistant barrier.
"